<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
-->
<svg xmlns="http://www.w3.org/2000/svg">
  
  <title>Test 'stroke-linecap: round' with zero length path segments</title>

  <!-- From https://bugzilla.mozilla.org/show_bug.cgi?id=1075399 for paths and
       https://bugzilla.mozilla.org/show_bug.cgi?id=1187770 for lines -->

  <style>

path, line {
  stroke-width: 20px;
  stroke-linecap: round;
}

circle {
  fill: red;
}

/* expect lime circles to cover red circles */
path.circles-expected, line.circles-expected {
  stroke: lime;
}

path.circles-not-expected {
  stroke: red;
}

/* thicker stroke to cover circles-not-expected paths */
path.coverer {
  stroke: lime;
  stroke-width: 24px;
}

/* to show edges of shapes to help in debugging:
g > circle {
  stroke: red;
  stroke-width: 5px;
}
path.coverer {
  stroke: lime;
  stroke-width: 18px;
}
*/

  </style>

  <rect width="100%" height="100%" style="fill:lime"/>

  <!-- Column 1: test single segment zero-length subpaths: -->

  <g transform="translate(25,25)">
    <circle cx="0" cy="0" r="8"/>
    <circle cx="50" cy="50" r="8"/>
    <circle cx="100" cy="100" r="8"/>
    <path class="circles-expected" d="M0,0 L0,0  M20,20 L30,30  M50,50 L50,50  M70,70 L80,80  M100,100 L100,100"/>
  </g>

  <g transform="translate(25,75)">
    <circle cx="0" cy="0" r="8"/>
    <circle cx="50" cy="50" r="8"/>
    <circle cx="100" cy="100" r="8"/>
    <path class="circles-expected" d="M0,0 C0,0 0,0 0,0  M20,20 L30,30  M50,50 C50,50 50,50 50,50  M70,70 L80,80  M100,100 C100,100 100,100 100,100"/>
  </g>

  <g transform="translate(25,125)">
    <circle cx="0" cy="0" r="8"/>
    <circle cx="50" cy="50" r="8"/>
    <circle cx="100" cy="100" r="8"/>
    <path class="circles-expected" d="M0,0 A0,10 0 0 0 0,0  M20,20 L30,30  M50,50 A0,10 0 0 0 50,50  M70,70 L80,80  M100,100 A0,10 0 0 0 100,100"/>
  </g>

  <g transform="translate(25,175)">
    <circle cx="0" cy="0" r="8"/>
    <circle cx="50" cy="50" r="8"/>
    <circle cx="100" cy="100" r="8"/>
    <path class="circles-expected" d="M0,0 Z  M20,20 L30,30  M50,50 Z  M70,70 L80,80  M100,100 Z"/>
  </g>


  <!-- Column 2: test multi-segment zero-length subpaths: -->

  <g transform="translate(175,25)">
    <circle cx="0" cy="0" r="8"/>
    <circle cx="50" cy="50" r="8"/>
    <circle cx="100" cy="100" r="8"/>
    <path class="circles-expected" d="M0,0 L0,0 M0,0 L0,0  M20,20 L30,30  M50,50 L50,50 L50,50  M70,70 L80,80  M100,100 L100,100 L100,100"/>
  </g>

  <g transform="translate(177,75)">
    <circle cx="0" cy="0" r="8"/>
    <circle cx="50" cy="50" r="8"/>
    <circle cx="100" cy="100" r="8"/>
    <path class="circles-expected" d="M0,0 C0,0 0,0 0,0 C0,0 0,0 0,0  M20,20 L30,30  M50,50 C50,50 50,50 50,50 C50,50 50,50 50,50  M70,70 L80,80  M100,100 C100,100 100,100 100,100 C100,100 100,100 100,100"/>
  </g>

  <g transform="translate(175,125)">
    <circle cx="0" cy="0" r="8"/>
    <circle cx="50" cy="50" r="8"/>
    <circle cx="100" cy="100" r="8"/>
    <path class="circles-expected" d="M0,0 A0,10 0 0 0 0,0 A0,10 0 0 0 0,0  M20,20 L30,30  M50,50 A0,10 0 0 0 50,50 A0,10 0 0 0 50,50  M70,70 L80,80  M100,100 A0,10 0 0 0 100,100 A0,10 0 0 0 100,100"/>
  </g>

  <g transform="translate(175,175)">
    <circle cx="0" cy="0" r="8"/>
    <circle cx="50" cy="50" r="8"/>
    <circle cx="100" cy="100" r="8"/>
    <path class="circles-expected" d="M0,0 Z Z  M20,20 L30,30  M50,50 Z Z  M70,70 L80,80  M100,100 Z Z"/>
  </g>


  <!-- Column 3: test non-zero-length subpaths that begin, end and contain
       zero length segments: -->

  <g transform="translate(325,25)">
    <path class="circles-not-expected" d="M20,20 L20,20 L30,30 L30,30 L40,40 L40,40"/>
    <path class="coverer" d="M20,20 L40,40"/>
  </g>

  <g transform="translate(325,75)">
    <path class="circles-not-expected" d="M20,20 C20,20 20,20 20,20 C20,20 30,30 30,30 C30,30 30,30 30,30 C30,30 40,40 40,40 C40,40 40,40 40,40"/>
    <path class="coverer" d="M20,20 L40,40"/>
  </g>

  <g transform="translate(325,125)">
    <path class="circles-not-expected" d="M20,20 A0,10 0 0 0 20,20 A0,10 0 0 0 30,30 A0,10 0 0 0 30,30 A0,10 0 0 0 40,40 A0,10 0 0 0 40,40"/>
    <path class="coverer" d="M20,20 L40,40"/>
  </g>

  <!-- this one is shorter because the Z's mean we only have path end points
       at 20,20 -->
  <g transform="translate(325,175)">
    <circle cx="20" cy="20" r="8"/>
    <path class="circles-expected" d="M20,20 Z L30,30 Z L40,40 Z"/>
  </g>


  <!-- Column 4: test lone movetos -->

  <g transform="translate(425,25)">
    <path class="circles-not-expected" d="M0,0 M0,0  M20,20 L30,30  M50,50 M50,50  M70,70 L80,80  M100,100 M100,100"/>
    <path class="coverer" d="M20,20 L30,30 M70,70 L80,80"/>
  </g>

  <!-- Column 5: test stroke-dasharray -->

  <g transform="translate(525,25)">
    <circle cy="0" r="8"/>
    <circle cy="40" r="8"/>
    <circle cy="80" r="8"/>
    <path class="circles-expected" d="M0,0v81" stroke-dasharray="0 40" />
  </g>
  <g transform="translate(575,25)">
    <circle cy="0" r="8"/>
    <circle cy="40" r="8"/>
    <circle cy="80" r="8"/>
    <path class="circles-expected" d="M0,0v81" stroke-dasharray="0" />
  </g>

  <!-- Column 6: test zero-length line -->
  <g transform="translate(625, 25)">
    <circle cy="0" r="8" />
    <line class="circles-expected" x1="0" y1="0" x2="0" y2="0" />
  </g>

</svg>
